scratched glasses when using my M2

A more enjoyable alternative (imo) is to use the orange rubber sealing washer from a bottle of Grolsch, it fits around the eyepiece and is just thick enough to keep your glasses clear of the metal.
 
I like the Grolsch gasket idea - I have been using a rubber key identifier ring. These are very cheap and have a little ridge that fits into the eyepiece nicely...

8317499019_2883667d38_c.jpg
 
Back
Top Bottom